Open dialog panel after long pressing a direct share target to allow pin/unpin...

Open dialog panel after long pressing a direct share target to allow pin/unpin the target. Communicate with ShortcutManager/Launcherapps to store pin info in ShortcutService.

Bug: 210453009
Test: manual test on local phone
Test: atest ChooserActivityTest
Change-Id: Ibcc83037ca801ee0ecf2306eae954677529fa849
(cherry picked from commit 63932258)
Merged-In: Ibcc83037ca801ee0ecf2306eae954677529fa849